Authoi-'s Catalogue. 395 
COLLINS, H. F. 
The Mines of Lauiium, Greece. (Engr. Mln. Jour., vol 78, p. 75, 
Nov. 10, 1904.) 
CROSS, WHITMAN. 
An occurrence of Trachyte on the island of Hawaii, (Jour. Geol., 
vol. 12. pp. 510-524, Sept.-Oct., 1904.) ' 
CUSHMAN, A. S. 
The colloid theoiT of pla.sticity. (Trans. Am. Cer. Soc, Cincin- 
nati meeting. Feb., 1904.) 
CUSHMAN, J. A. 
Miocene barnacles from Gay Head, Mass., with notes on Balanus 
proteus Conrad. (Am. Geol., vol. 84, p. 293, Nov., 1904.) 
DAVIS, W. M. 
Geography in the United States (Proc. A. A. A. S., 53rd meeting, 
St. Louis, pp. 471-502, 1904). 
DAWSON, GEO. M. 
Sunnnary Report of the Geological Survey, 190O. (Ann. Report, 
Geol. Surv. Can., 1900, pp. 1-203. 1903. 
DOWLING, D. B. 
On geological explorations in Athabaska,. Saskatchewan and Kee- 
watin districts. (Geol. Sur. Can., Ann. Rep., 1900, Rep. FT", pp. 40, 
1903.) ... 
DRESSER, JOHN A. 
On the Geology and Petrography of Shefford mountain, Q. (Geol. 
Sur. Can., Ann. Rep., 1900, Rep. L, pp. 34, 1903.) 
EASTMAN, C. R. 
Earliest mention of fossil fishes. (Science, vol. 20, p. 648, Nov. 11, 
1903.) 
ECKEL, E. C. 
The materials and manufacture of Portland cement. (Bull. 8, 
Geol. Sur. Ala., 59 pp., Montgomery, 1904.) 
FOERSTE, A. F. ' 
Ordovician-Silurian Contact in the Ripley Island area of southern 
Indiana, with notes on the age of the Cincinnati geanticline. (Am. 
Jour. Sci.. vol. IS, pp. 321-343. Nov., 1904.) 
GIRTY, GEORGE H. 
The type of Aviculipecten. (Am. Geo., vol. 34, p. 332, Nov., 1904.) 
GORDON, C. H. 
On the origin and classification of gneisses. (Proc. Neb. Acad. 
Sci., Nov. 1901, pp. 90-96.) 
HOBBS, W. H. 
Teqtonic Geography of Eastern Asia. (Am. Geol., vol. 34, pp 
2S3-291, Nov. 1904.) 
HOFFMAN, G. C. 
Report on the Section of Chemistry and MineraJogy. (Geol. Sur. 
Can., Ann. Rep., 1900, Rep. R, pp. 67, 1903.) 
